固定文章编码

scripts/sql/init.sql

@@ -175,6 +175,7 @@ drop table if exists article cascade;
 create table article (
     id         int generated by default as identity primary key,
     group_id   int  not null,
+    code       text,
     title      text not null,
     content    text,
     sort       int  not null default 0,
@@ -183,6 +184,7 @@ create table article (
     updated_at timestamptz default current_timestamp,
     deleted_at timestamptz
 );
+create unique index udx_article_code on article (code) where code is not null and deleted_at is null;
 create index idx_article_group_id on article (group_id) where deleted_at is null;
 create index idx_article_status on article (status) where deleted_at is null;
 create index idx_article_sort on article (sort) where deleted_at is null;
@@ -191,6 +193,7 @@ create index idx_article_sort on article (sort) where deleted_at is null;
 comment on table article is '文章表';
 comment on column article.id is '文章ID';
 comment on column article.group_id is '分组ID';
+comment on column article.code is '文章编码，用于固定引用链接';
 comment on column article.title is '文章标题';
 comment on column article.content is '文章内容';
 comment on column article.sort is '文章排序';